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Table 4 Regression analysis results

From: Reduction of arsenic content in a complex galena concentrate by Acidithiobacillus ferrooxidans

Predictor

Coefficient

T value

Probability

Constant

52.0270

6.76

0.000

Pulp density %

-66.3470

-14.05

0.000

Surface area

-32.5570

-6.89

0.000

Ferric chloride

-21.0730

-4.46

0.000

Carbon dioxide

-12.5350

-2.65

0.009

Air

29.3000

6.20

0.000

9 K medium

29.3010

6.20

0.000

Strain

3.0020

0.64

0.526

Days

3.9396

14.41

0.000